Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers. the name and structure for the first isomer, hexane, are given. hexane is a six carbon chain. there are three hydrogen atoms bonded to the terminal carbon atoms and two hydrogen atoms bonded to the remaining four carbon atoms in the chain. isomer a: hexane a five carbon chain with a methyl substituent bonded to the second carbon in the chain. isomer b name isomer b. isomer c, has the iupac name 3‑methylpentane.